Bicycle frame



FIG. 1 is a right side view of a bicycle frame according to my novel design;

FIG. 2 is a left side view of a bicycle frame according to my novel design;

FIG. 3 is a front view of a bicycle frame according to my novel design;

FIG. 4 is a rear view of a bicycle frame according to my novel design;

FIG. 5 is a perspective view from above and the right side of the bicycle frame according to my novel design;

FIG. 6 is a perspective view from above and the front of the bicycle frame according to my novel design; and,

FIG. 7 is a top view of the bicycle frame according to my novel design.

The dash line showings are for purposes of depicting the environment and are not part of the claimed design. 

The ornamental design for a bicycle frame, as shown and described. 